High Quality Content by WIKIPEDIA articles! Tinea versicolor (also known as "Dermatomycosis furfuracea," "Pityriasis versicolor," and "Tinea flava") is a condition characterized by a rash on the trunk and proximal extremities. Recent research has shown that the majority of pityriasis versicolor is caused by Malassezia globosa, although M. furfur is responsible for a small number of cases. These yeasts are normally found on the human skin and only become troublesome under certain circumstances, such as a warm and humid environment, although the exact conditions that cause initiation of the disease process are poorly understood. The condition pityriasis versicolor was first identified in 1846.